/**
 * @class Ext.grid.Column
 * 
This class encapsulates column configuration data to be used in the initialization of a
 * {@link Ext.grid.ColumnModel ColumnModel}.
 * 
While subclasses are provided to render data in different ways, this class renders a passed
 * data field unchanged and is usually used for textual columns.
 */
Ext.grid.Column = function(config){
    Ext.apply(this, config);

    if(typeof this.renderer == 'string'){
        this.renderer = Ext.util.Format[this.renderer];
    } else if(Ext.isObject(this.renderer)){
        this.scope = this.renderer.scope;
        this.renderer = this.renderer.fn;
    }
    this.renderer = this.renderer.createDelegate(this.scope || config);

    if(this.id === undefined){
        this.id = ++Ext.grid.Column.AUTO_ID;
    }
    if(this.editor){
        this.editor = Ext.create(this.editor, 'textfield');
    }
};

Ext.grid.Column.AUTO_ID = 0;

Ext.grid.Column.prototype = {
    
/**
     * @cfg {Boolean} editable Optional. Defaults to true, enabling the configured
     * {@link #editor}.  Set to false to initially disable editing on this column.
     * The initial configuration may be dynamically altered using
     * {@link Ext.grid.ColumnModel}.{@link Ext.grid.ColumnModel#setEditable setEditable()}.
     */
    
/**
     * @cfg {String} id Optional. A name which identifies this column (defaults to the column's initial
     * ordinal position.) The id is used to create a CSS class name which is applied to all
     * table cells (including headers) in that column (in this context the id does not need to be
     * unique). The class name takes the form of 
x-grid3-td-id
     * Header cells will also receive this class name, but will also have the class 
x-grid3-hd
     * So, to target header cells, use CSS selectors such as:
.x-grid3-hd-row .x-grid3-td-id
     * The {@link Ext.grid.GridPanel#autoExpandColumn} grid config option references the column via this
     * unique identifier.
     */
    
/**
     * @cfg {String} header Optional. The header text to be used as innerHTML
     * (html tags are accepted) to display in the Grid view.  Note: to
     * have a clickable header with no text displayed use ' '.
     */
    
/**
     * @cfg {Boolean} groupable Optional. If the grid is being rendered by an {@link Ext.grid.GroupingView}, this option
     * may be used to disable the header menu item to group by the column selected. Defaults to true,
     * which enables the header menu group option.  Set to false to disable (but still show) the
     * group option in the header menu for the column. See also {@link #groupName}.
     */
    
/**
     * @cfg {String} groupName Optional. If the grid is being rendered by an {@link Ext.grid.GroupingView}, this option
     * may be used to specify the text with which to prefix the group field value in the group header line.
     * See also {@link #groupRenderer} and
     * {@link Ext.grid.GroupingView}.{@link Ext.grid.GroupingView#showGroupName showGroupName}.
     */
    
/**
     * @cfg {Function} groupRenderer 
Optional. If the grid is being rendered by an {@link Ext.grid.GroupingView}, this option
     * may be used to specify the function used to format the grouping field value for display in the group
     * {@link #groupName header}.  If a groupRenderer is not specified, the configured
     * {@link #renderer} will be called; if a {@link #renderer} is also not specified
     * the new value of the group field will be used.
     * 
The called function (either the groupRenderer or {@link #renderer}) will be
     * passed the following parameters:
     * 

     * 
v : Object
The new value of the group field.
     * 
unused : undefined
Unused parameter.
     * 
r : Ext.data.Record
The Record providing the data
     * for the row which caused group change.
     * 
rowIndex : Number
The row index of the Record which caused group change.
     * 
colIndex : Number
The column index of the group field.
     * 
ds : Ext.data.Store
The Store which is providing the data Model.
     * 

     * 
The function should return a string value.
     */
    
/**
     * @cfg {String} emptyGroupText Optional. If the grid is being rendered by an {@link Ext.grid.GroupingView}, this option
     * may be used to specify the text to display when there is an empty group value. Defaults to the
     * {@link Ext.grid.GroupingView}.{@link Ext.grid.GroupingView#emptyGroupText emptyGroupText}.
     */
    
/**
     * @cfg {String} dataIndex 
Required. The name of the field in the
     * grid's {@link Ext.data.Store}'s {@link Ext.data.Record} definition from
     * which to draw the column's value.
     */
    
/**
     * @cfg {Number} width
     * Optional. The initial width in pixels of the column.
     * The width of each column can also be affected if any of the following are configured:
     * 

     * 
{@link Ext.grid.GridPanel}.{@link Ext.grid.GridPanel#autoExpandColumn autoExpandColumn}
     * 
{@link Ext.grid.GridView}.{@link Ext.grid.GridView#forceFit forceFit}
     * 

     * 
By specifying forceFit:true, {@link #fixed non-fixed width} columns will be
     * re-proportioned (based on the relative initial widths) to fill the width of the grid so
     * that no horizontal scrollbar is shown.
     * 
     * 
{@link Ext.grid.GridView}.{@link Ext.grid.GridView#autoFill autoFill}
     * 
{@link Ext.grid.GridPanel}.{@link Ext.grid.GridPanel#minColumnWidth minColumnWidth}
     * 
Note: when the width of each column is determined, a space on the right side
     * is reserved for the vertical scrollbar.  The
     * {@link Ext.grid.GridView}.{@link Ext.grid.GridView#scrollOffset scrollOffset}
     * can be modified to reduce or eliminate the reserved offset.
     */
    
/**
     * @cfg {Boolean} sortable Optional. true if sorting is to be allowed on this column.
     * Defaults to the value of the {@link #defaultSortable} property.
     * Whether local/remote sorting is used is specified in {@link Ext.data.Store#remoteSort}.
     */
    
/**
     * @cfg {Boolean} fixed Optional. true if the column width cannot be changed.  Defaults to false.
     */
    
/**
     * @cfg {Boolean} resizable Optional. false to disable column resizing. Defaults to true.
     */
    
/**
     * @cfg {Boolean} menuDisabled Optional. true to disable the column menu. Defaults to false.
     */
    
/**
     * @cfg {Boolean} hidden Optional. true to hide the column. Defaults to false.
     */
    
/**
     * @cfg {String} tooltip Optional. A text string to use as the column header's tooltip.  If Quicktips
     * are enabled, this value will be used as the text of the quick tip, otherwise it will be set as the
     * header's HTML title attribute. Defaults to ''.
     */
    
/**
     * @cfg {Mixed} renderer
     * 
For an alternative to specifying a renderer see {@link #xtype}
     * 
Optional. A renderer is an 'interceptor' method which can be used transform data (value,
     * appearance, etc.) before it is rendered). This may be specified in either of three ways:
     * 

     * 
A renderer function used to return HTML markup for a cell given the cell's data value.
     * 
A string which references a property name of the {@link Ext.util.Format} class which
     * provides a renderer function.
     * 
An object specifying both the renderer function, and its execution scope (this
     * reference) e.g.:

{
    fn: this.gridRenderer,
    scope: this
}

     * If not specified, the default renderer uses the raw data value.

     * 
For information about the renderer function (passed parameters, etc.), see
     * {@link Ext.grid.ColumnModel#setRenderer}. An example of specifying renderer function inline:

var companyColumn = {
   header: 'Company Name',
   dataIndex: 'company',
   renderer: function(value, metaData, record, rowIndex, colIndex, store) {
      // provide the logic depending on business rules
      // name of your own choosing to manipulate the cell depending upon
      // the data in the underlying Record object.
      if (value == 'whatever') {
          //metaData.css : String : A CSS class name to add to the TD element of the cell.
          //metaData.attr : String : An html attribute definition string to apply to
          //                         the data container element within the table
          //                         cell (e.g. 'style="color:red;"').
          metaData.css = 'name-of-css-class-you-will-define';
      }
      return value;
   }
}
     * 
     * See also {@link #scope}.
     */
    
/**
     * @cfg {String} xtype Optional. A String which references a predefined {@link Ext.grid.Column} subclass
     * type which is preconfigured with an appropriate {@link #renderer} to be easily
     * configured into a ColumnModel. The predefined {@link Ext.grid.Column} subclass types are:
     * 

     * 
gridcolumn : {@link Ext.grid.Column} (Default)

     * 
booleancolumn : {@link Ext.grid.BooleanColumn}

     * 
numbercolumn : {@link Ext.grid.NumberColumn}

     * 
datecolumn : {@link Ext.grid.DateColumn}

     * 
templatecolumn : {@link Ext.grid.TemplateColumn}

     * 
     * 
Configuration properties for the specified xtype may be specified with
     * the Column configuration properties, for example:
     * 

var grid = new Ext.grid.GridPanel({
    ...
    columns: [{
        header: 'Last Updated',
        dataIndex: 'lastChange',
        width: 85,
        sortable: true,
        //renderer: Ext.util.Format.dateRenderer('m/d/Y'),
        xtype: 'datecolumn', // use xtype instead of renderer
        format: 'M/d/Y' // configuration property for {@link Ext.grid.DateColumn}
    }, {
        ...
    }]
});
     * 
     */
    
/**
     * @cfg {Object} scope Optional. The scope (this reference) in which to execute the
     * renderer.  Defaults to the Column configuration object.
     */
    
/**
     * @cfg {String} align Optional. Set the CSS text-align property of the column.  Defaults to undefined.
     */
    
/**
     * @cfg {String} css Optional. An inline style definition string which is applied to all table cells in the column
     * (excluding headers). Defaults to undefined.
     */
    
/**
     * @cfg {Boolean} hideable Optional. Specify as false to prevent the user from hiding this column
     * (defaults to true).  To disallow column hiding globally for all columns in the grid, use
     * {@link Ext.grid.GridPanel#enableColumnHide} instead.
     */
    
/**
     * @cfg {Ext.form.Field} editor Optional. The {@link Ext.form.Field} to use when editing values in this column
     * if editing is supported by the grid. See {@link #editable} also.
     */

    // private. Used by ColumnModel to avoid reprocessing
    isColumn : true,
    
/**
     * Optional. A function which returns displayable data when passed the following parameters:
     * 

     * 
value : Object
The data value for the cell.
     * 
metadata : Object
An object in which you may set the following attributes:

     * 
css : String
A CSS class name to add to the cell's TD element.
     * 
attr : String
An HTML attribute definition string to apply to the data container
     * element within the table cell (e.g. 'style="color:red;"').

     * 
record : Ext.data.record
The {@link Ext.data.Record} from which the data was
     * extracted.
     * 
rowIndex : Number
Row index
     * 
colIndex : Number
Column index
     * 
store : Ext.data.Store
The {@link Ext.data.Store} object from which the Record
     * was extracted.
     * 
     * @property renderer
     * @type Function
     */
    renderer : function(value){
        if(typeof value == 'string' && value.length < 1){
            return ' ';
        }
        return value;
    },

    // private
    getEditor: function(rowIndex){
        return this.editable !== false ? this.editor : null;
    },

    
/**
     * Returns the {@link Ext.Editor editor} defined for this column that was created to wrap the {@link Ext.form.Field Field}
     * used to edit the cell.
     * @param {Number} rowIndex The row index
     * @return {Ext.Editor}
     */
    getCellEditor: function(rowIndex){
        var editor = this.getEditor(rowIndex);
        if(editor){
            if(!editor.startEdit){
                if(!editor.gridEditor){
                    editor.gridEditor = new Ext.grid.GridEditor(editor);
                }
                return editor.gridEditor;
            }else if(editor.startEdit){
                return editor;
            }
        }
        return null;
    }
};

/**
 * @class Ext.grid.BooleanColumn
 * @extends Ext.grid.Column
 * 
A Column definition class which renders boolean data fields.  See the {@link Ext.grid.ColumnModel#xtype xtype}
 * config option of {@link Ext.grid.ColumnModel} for more details.
 */
Ext.grid.BooleanColumn = Ext.extend(Ext.grid.Column, {
    
/**
     * @cfg {String} trueText
     * The string returned by the renderer when the column value is not falsey (defaults to 'true').
     */
    trueText: 'true',
    
/**
     * @cfg {String} falseText
     * The string returned by the renderer when the column value is falsey (but not undefined) (defaults to
     * 'false').
     */
    falseText: 'false',
    
/**
     * @cfg {String} undefinedText
     * The string returned by the renderer when the column value is undefined (defaults to ' ').
     */
    undefinedText: ' ',

    constructor: function(cfg){
        Ext.grid.BooleanColumn.superclass.constructor.call(this, cfg);
        var t = this.trueText, f = this.falseText, u = this.undefinedText;
        this.renderer = function(v){
            if(v === undefined){
                return u;
            }
            if(!v || v === 'false'){
                return f;
            }
            return t;
        };
    }
});

/**
 * @class Ext.grid.NumberColumn
 * @extends Ext.grid.Column
 * 
A Column definition class which renders a numeric data field according to a {@link #format} string.  See the
 * {@link Ext.grid.ColumnModel#xtype xtype} config option of {@link Ext.grid.ColumnModel} for more details.
 */
Ext.grid.NumberColumn = Ext.extend(Ext.grid.Column, {
    
/**
     * @cfg {String} format
     * A formatting string as used by {@link Ext.util.Format#number} to format a numeric value for this Column
     * (defaults to '0,000.00').
     */
    format : '0,000.00',
    constructor: function(cfg){
        Ext.grid.NumberColumn.superclass.constructor.call(this, cfg);
        this.renderer = Ext.util.Format.numberRenderer(this.format);
    }
});

/**
 * @class Ext.grid.DateColumn
 * @extends Ext.grid.Column
 * 
A Column definition class which renders a passed date according to the default locale, or a configured
 * {@link #format}. See the {@link Ext.grid.ColumnModel#xtype xtype} config option of {@link Ext.grid.ColumnModel}
 * for more details.
 */
Ext.grid.DateColumn = Ext.extend(Ext.grid.Column, {
    
/**
     * @cfg {String} format
     * A formatting string as used by {@link Date#format} to format a Date for this Column
     * (defaults to 'm/d/Y').
     */
    format : 'm/d/Y',
    constructor: function(cfg){
        Ext.grid.DateColumn.superclass.constructor.call(this, cfg);
        this.renderer = Ext.util.Format.dateRenderer(this.format);
    }
});

/**
 * @class Ext.grid.TemplateColumn
 * @extends Ext.grid.Column
 * 
A Column definition class which renders a value by processing a {@link Ext.data.Record Record}'s
 * {@link Ext.data.Record#data data} using a {@link #tpl configured} {@link Ext.XTemplate XTemplate}.
 * See the {@link Ext.grid.ColumnModel#xtype xtype} config option of {@link Ext.grid.ColumnModel} for more
 * details.
 */
Ext.grid.TemplateColumn = Ext.extend(Ext.grid.Column, {
    
/**
     * @cfg {String/XTemplate} tpl
     * An {@link Ext.XTemplate XTemplate}, or an XTemplate definition string to use to process a
     * {@link Ext.data.Record Record}'s {@link Ext.data.Record#data data} to produce a column's rendered value.
     */
    constructor: function(cfg){
        Ext.grid.TemplateColumn.superclass.constructor.call(this, cfg);
        var tpl = typeof Ext.isObject(this.tpl) ? this.tpl : new Ext.XTemplate(this.tpl);
        this.renderer = function(value, p, r){
            return tpl.apply(r.data);
        };
        this.tpl = tpl;
    }
});

/*
 * @property types
 * @type Object
 * @member Ext.grid.Column
 * @static
 * 
An object containing predefined Column classes keyed by a mnemonic code which may be referenced
 * by the {@link Ext.grid.ColumnModel#xtype xtype} config option of ColumnModel.
 * 
This contains the following properties

 * 
gridcolumn : {@link Ext.grid.Column Column constructor}
 * 
booleancolumn : {@link Ext.grid.BooleanColumn BooleanColumn constructor}
 * 
numbercolumn : {@link Ext.grid.NumberColumn NumberColumn constructor}
 * 
datecolumn : {@link Ext.grid.DateColumn DateColumn constructor}
 * 
templatecolumn : {@link Ext.grid.TemplateColumn TemplateColumn constructor}
 * 
 */
Ext.grid.Column.types = {
    gridcolumn : Ext.grid.Column,
    booleancolumn: Ext.grid.BooleanColumn,
    numbercolumn: Ext.grid.NumberColumn,
    datecolumn: Ext.grid.DateColumn,
    templatecolumn: Ext.grid.TemplateColumn
};